<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>第一个案例</title>
</head>
<body>
<!-- 超链接 -->
<a href="http://www.itheima.com/"><h1 align="center">黑马</h1></a>
<div style="color:red">你好,黑马程序员001</div>
<hr color="red" size="5" width="100%"/>
</body>
</html>